feat(blocks): Add github list stargazers block (#9172)

This adds a list stargazers block, its using
https://docs.github.com/en/rest/activity/starring?apiVersion=2022-11-28#list-stargazers


![image](https://github.com/user-attachments/assets/0fe87a97-ebea-40c2-818d-28f6555ae91c)

autogpt_platform/backend/backend/blocks/github/pull_requests.py

@@ -840,3 +840,93 @@ class GithubCreateRepositoryBlock(Block):
             yield "clone_url", clone_url
         except Exception as e:
             yield "error", str(e)
+
+
+class GithubListStargazersBlock(Block):
+    class Input(BlockSchema):
+        credentials: GithubCredentialsInput = GithubCredentialsField("repo")
+        repo_url: str = SchemaField(
+            description="URL of the GitHub repository",
+            placeholder="https://github.com/owner/repo",
+        )
+
+    class Output(BlockSchema):
+        class StargazerItem(TypedDict):
+            username: str
+            url: str
+
+        stargazer: StargazerItem = SchemaField(
+            title="Stargazer",
+            description="Stargazers with their username and profile URL",
+        )
+        error: str = SchemaField(
+            description="Error message if listing stargazers failed"
+        )
+
+    def __init__(self):
+        super().__init__(
+            id="a4b9c2d1-e5f6-4g7h-8i9j-0k1l2m3n4o5p",  # Generated unique UUID
+            description="This block lists all users who have starred a specified GitHub repository.",
+            categories={BlockCategory.DEVELOPER_TOOLS},
+            input_schema=GithubListStargazersBlock.Input,
+            output_schema=GithubListStargazersBlock.Output,
+            test_input={
+                "repo_url": "https://github.com/owner/repo",
+                "credentials": TEST_CREDENTIALS_INPUT,
+            },
+            test_credentials=TEST_CREDENTIALS,
+            test_output=[
+                (
+                    "stargazer",
+                    {
+                        "username": "octocat",
+                        "url": "https://github.com/octocat",
+                    },
+                )
+            ],
+            test_mock={
+                "list_stargazers": lambda *args, **kwargs: [
+                    {
+                        "username": "octocat",
+                        "url": "https://github.com/octocat",
+                    }
+                ]
+            },
+        )
+
+    @staticmethod
+    def list_stargazers(
+        credentials: GithubCredentials, repo_url: str
+    ) -> list[Output.StargazerItem]:
+        api = get_api(credentials)
+        # Add /stargazers to the repo URL to get stargazers endpoint
+        stargazers_url = f"{repo_url}/stargazers"
+        # Set accept header to get starred_at timestamp
+        headers = {"Accept": "application/vnd.github.star+json"}
+        response = api.get(stargazers_url, headers=headers)
+        data = response.json()
+
+        stargazers: list[GithubListStargazersBlock.Output.StargazerItem] = [
+            {
+                "username": stargazer["login"],
+                "url": stargazer["html_url"],
+            }
+            for stargazer in data
+        ]
+        return stargazers
+
+    def run(
+        self,
+        input_data: Input,
+        *,
+        credentials: GithubCredentials,
+        **kwargs,
+    ) -> BlockOutput:
+        try:
+            stargazers = self.list_stargazers(
+                credentials,
+                input_data.repo_url,
+            )
+            yield from (("stargazer", stargazer) for stargazer in stargazers)
+        except Exception as e:
+            yield "error", str(e)